Use these options to specify how the date range returns results. "Exact" means that the start and end dates of descriptions returned must fall entirely within the date range entered. "Overlapping" means that any description whose start or end dates touch or overlap the target date range will be returned.

Introduction to the reports of the Director-General for 1957 and for the first semester of 1958; Report by the Director-General on the activities of the Organization, 1 January-30 June 1958; Report by the Director-General on the activities of the Organization, 1 July-30 September 1958

Report by the Director-General and the Executive Board on the activities of the Organization during the year 1953, presented to the Member States and the General Conference at its eighth session, Montevideo, November-December 1954